My house is on 3 levels and as such i have 4 staircases to get me to the top.The thing is I don't like the banister in it(cheap lumps of wood from stair to stair).I had a guy into give me a quote and he thinks the bits of 2X4 that join each stair case aren't load bearing(from top to bottom of each pair of stair) ,I'm thinking the same a surely such a thin bit of wood couldn't carry the weight of those stair cases.What does everyone think